Very well spotted, Nick - I'm sure that you are correct.
I attach a pic of the Sowerby #1130 sugar bowl from Sowerby pattern book XI for permanent reference.
Anne, I have never seen photos of this Sowerby pattern before, so can I have your permission to add copies of your images to the Sowerby pattern album on the Glass Queries gallery, please?
Pattern #1130 is shown as being from a registered design. The style and pattern number probably point to a registration date in late 1875 or early 1876 (which means RD number in the 290000s). If Paul happens by this post, I wonder if he would be kind enough to check through the Sowerby design representations for a likely match, please?
Fred.